I am not sure if this is an internet connection issue but I tried now several times while everything else seems to work smoothly in AGOL. I am trying to create a Filter Configurable WebApp from a Webmap that is shared in a group inside my company's subscription. When I select the app coming from the share botton in the Webmap I can specify the title, tags etc. and click Done, then it says Creating Web App, starts the configuration screen but then nothing happens.
I also tried the Compare WebApp and it showed me the configuration panel but not the maps I had selected.
Fiddler does not seem to find any problem.
I tried another map and it worked. What could be the issue with my map that it does not want to create an app from it? Is there a problem with the layer(s)?